Reassign All Po's at once

An Employee has left the company, he was involved in the Approval Cycle in a lot of Po's.

I already change the approval role, So for any new PO, all is well,

but for the already submitted Po's when the PO reaches this employee it get stuck, and every time I have to reassign it one by one from the transaction Console.

Is there's any way to do it faster by Reassigning all Po's for that  Employee to the new one?